<?php
/**
 * 免翻墙上google
 * @author 自娱自乐自逍遥 <wapznw@gmail.com>
 * Date: 2015/2/6
 * Time: 11:42
*/

define('START_TAG','#google-hosts-2015');
define('END_TAG','#google-hosts-2015-end');
if(!empty($argv[1])){
 $params = array();
 parse_str($argv[1], $params);
if(isset($params['url'])){
 define('GOOGLE_HOST_URL', $params['url']);
}
if(isset($params['del'])){
define('DELETE_GOOGLE_HOST',true);
}
}
defined('GOOGLE_HOST_URL') || define('GOOGLE_HOST_URL', 'http://106.14.8.251/api/hosttypes/7,53/get');

if(PHP_OS == 'WINNT'){
 define('HOSTS_FILE_PATH', 'C:WindowsSystem32driversetchosts');
}else if(in_array(PHP_OS, array('Linux','Darwin','FreeBSD','OpenBSD','WIN32','Windows','Unix'))){
 define('HOSTS_FILE_PATH', '/etc/hosts');
}else{
 die('Unsupported system!'.PHP_EOL);
}

if(!is_writable(HOSTS_FILE_PATH)){
 die('Without permission, please use the root user to perform!'.PHP_EOL);
}

$hosts = file_get_contents(HOSTS_FILE_PATH);

$startPos = strpos($hosts, START_TAG);
if(!defined('DELETE_GOOGLE_HOST')){
 $gs = get_google_hosts();
 echo GOOGLE_HOST_URL.PHP_EOL;
 echo $gs.PHP_EOL;
}else{
 $gs = '';
 echo 'reset hosts'.PHP_EOL;
}

if($startPos){
 $_tmp = substr($hosts, $startPos, strpos($hosts, END_TAG) - $startPos + strlen(END_TAG));
 $hosts = str_replace($_tmp,$gs,$hosts);
}else{
 $hosts.= PHP_EOL.$gs;
}

$old_file_size = filesize(HOSTS_FILE_PATH);

if(file_put_contents(HOSTS_FILE_PATH, $hosts)){
 die('success. '.PHP_EOL);
}else{
die('fail'.PHP_EOL);
}

function get_google_hosts(){
 $html = file_get_contents(GOOGLE_HOST_URL);

 $html = json_decode($html);

 //$startPos = strpos($html, START_TAG);
$new = '';
foreach ($html->hosts as $key => $value) {

  $new .= $value->record . PHP_EOL ;

}
    var_dump($new);




// $html = substr($html, $startPos, strpos($html,END_TAG) - $startPos);

// $html = str_replace(' ',' ',$html);
 return $new.END_TAG;
}
